- remove Eval/EvalOMP (moving them to a disabled/ subdir in order

to preserve SVN history). They are made useless by the new
  ei_eval_unless_lazy.
- introduce a generic Eval member typedef so one can do e.g.
  T t; U u; Product<T, U>::Eval m; m = t*u;

Eigen/Core

@@ -20,7 +20,6 @@ namespace Eigen {
 #include "src/Core/OperatorEquals.h"
 #include "src/Core/MatrixStorage.h"
 #include "src/Core/Matrix.h"
-#include "src/Core/Eval.h"
 #include "src/Core/Lazy.h"
 #include "src/Core/CwiseBinaryOp.h"
 #include "src/Core/CwiseUnaryOp.h"
@@ -43,7 +42,6 @@ namespace Eigen {
 #include "src/Core/Swap.h"
 #include "src/Core/CommaInitializer.h"
 #include "src/Core/AssociativeFunctors.h"
-#include "src/Core/EvalOMP.h"
 
 } // namespace Eigen
 

Eigen/src/Core/ForwardDeclarations.h

@@ -86,11 +86,17 @@ template<typename T, bool value> struct ei_conditional_eval
 
 template<typename T> struct ei_conditional_eval<T, true>
 {
-  typedef Eval<T> Type;
+  typedef Matrix<typename ei_traits<T>::Scalar,
+                 ei_traits<T>::RowsAtCompileTime,
+                 ei_traits<T>::ColsAtCompileTime,
+                 ei_traits<T>::Flags,
+                 ei_traits<T>::MaxRowsAtCompileTime,
+                 ei_traits<T>::MaxColsAtCompileTime> Type;
 };
 
 template<typename T> struct ei_eval_unless_lazy
 {
   typedef typename ei_conditional_eval<T, !(ei_traits<T>::Flags & LazyBit)>::Type Type;
 };
+
 #endif // EIGEN_FORWARDDECLARATIONS_H

Eigen/src/Core/MatrixBase.h

@@ -356,8 +356,10 @@ template<typename Derived> class MatrixBase
     template<typename NewType>
     const CwiseUnaryOp<ei_scalar_cast_op<NewType>, Derived> cast() const;
 
-    const typename ei_eval_unless_lazy<Derived>::Type eval() const EIGEN_ALWAYS_INLINE;
-    const EvalOMP<Derived> evalOMP() const EIGEN_ALWAYS_INLINE;
+    const typename ei_eval_unless_lazy<Derived>::Type eval() const EIGEN_ALWAYS_INLINE
+    {
+      return typename ei_eval_unless_lazy<Derived>::Type(derived());
+    }
 
     template<typename OtherDerived>
     void swap(const MatrixBase<OtherDerived>& other);

Eigen/src/Core/Util.h

@@ -117,7 +117,13 @@ enum { RowsAtCompileTime = Base::RowsAtCompileTime, \
        SizeAtCompileTime = Base::SizeAtCompileTime, \
        MaxSizeAtCompileTime = Base::MaxSizeAtCompileTime, \
        IsVectorAtCompileTime = Base::IsVectorAtCompileTime, \
-       Flags = Base::Flags };
+       Flags = Base::Flags }; \
+typedef Matrix<Scalar, \
+               RowsAtCompileTime, \
+               ColsAtCompileTime, \
+               Flags, \
+               MaxRowsAtCompileTime, \
+               MaxColsAtCompileTime> Eval;
 
 #define EIGEN_GENERIC_PUBLIC_INTERFACE(Derived) \
 _EIGEN_GENERIC_PUBLIC_INTERFACE(Derived, Eigen::MatrixBase<Derived>) \